diff --git a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRemoveController.php b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRemoveController.php
--- a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRemoveController.php
+++ b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRemoveController.php
@@ -38,10 +38,9 @@
     // from locked threads.
 
     $object = $xaction->getObject();
-    $can_interact = PhabricatorPolicyFilter::hasCapability(
+    $can_interact = PhabricatorPolicyFilter::canInteract(
       $viewer,
-      $object,
-      PhabricatorPolicyCapability::CAN_INTERACT);
+      $object);
     if (!$can_interact && !$viewer->getIsAdmin()) {
       return $this->newDialog()
         ->setTitle(pht('Conversation Locked'))